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The
American shad (
Alosa sapidissima), formerly found only on the Atlantic coast from Florida to Newfoundland, was introduced into the Pacific Ocean in 1871 and now ranges from San Diego to British Columbia. It is a migratory plankton eater and evidently enters deep water in fall. A good game fish, it may be 75 cm (30 inches) long. Young shad hatch in 6 to 15 days, enter the sea in fall,...